Dialkylstannoxy organometallic compounds and condensation products



United States Patent O" 3,307,973 DIALKYLSTANNOXY ORGANOMETALLIC COM- POUNDS AND CONDENSATION PRODUCTS Ambrose J. Gibbons, Jr., Catonsville, Md., assignor to The Glidden Company, Cleveland, Ohio, a corporation of Ohio No'Drawing. Filed Jan. 17, 1964, Ser. No. 338,294 7 Claims. (Cl. 117-154) This invention relates to novel organodimetallo compounds wherein one metal is tin and the other metal can be aluminum, silicon, boron, titanium, Zirconium, or vanadium of trisubstituted vanadium oxide. The invention also relates to a novel condensation process for preparing said compounds.

The compounds of the invention can be used in a variety of ways; e.g. as water-repellants on substrates such as paper, cloth, wood, cement, metals, etc.; as

fungicides, bacteriocides, insecticides, etc.; as stabilizers inhibiting 'heatand/or light-activated decomposition of rigid and/ or flexible. polyolefins, polyvinylhalides and other resins; and as starting monomers for the preparation of homopolymers.

The compounds of the invention are believed to correspond to the general formula Wherein R is an alkyl group of 1-8 carbons;

Wherein E is a radical selected from the group consisting of MX and M(R' )X Wherein X of the above radicals is a monovalent radical selected from the group consisting of OR radicals and halogens;

Wherein R is a monovalent radical selected from the group consisting of hydrocarbyl radicals and fluohydrocarbyl radicals of 1-18 carbon atoms;

Wherein R is a monovalent hydrocarbyl radical of 1-12 carbon atoms; I

Wherein M is selected from the group consisting of A1, Si, B, Ti, Zr and the trivalent vanadyl radical VO;

Wherein v is the valency of M (i.e. 3 or 4);

Wherein m is an integer between 1 and v-1 inclusive;

Wherein n is an integer between 1 and v inclusive;

And wherein m-I-n is not greater than v.

Accordingly, it is an object of this invention to provide compounds corresponding to the general formula set forth above.

It is another object to provide a process for preparing said compounds, said process being characterized by the condensation of dialkyl tin oxide with MX or compounds, wherein the alkyl group(s) of the tin oxide correspond to R of the above general formula, and wherein M, X, R and v are identical with M, X, R and v, respectively, of the general formula, and wherein m is an integer between '1 and v1.

These and related objects Will be understood from the foregoing and following description of the invention.

I have discovered that dialkyl tin oxide can be condensed with MX and M(R' )X compounds by simple heating; that is, no waste products result from said condensation. Thus the following equations apply where Patented Mar. 7, 1967 2 11 2Rsno+Mxi [men 0 1mm,

in) amsno+ MXi iRzsno nx' In like manner, up to three moles of R SnO can be condensed with MX where v is 3.

Where one of the starting materials is of the m') v-m' type, and v is 3, the following equations apply:

In like manner, three moles of R SnO can be condensed with a compound such as MR'X (where v is 4), whereas only one mole of R SnQ can be condensed with a compound such as M(R' )X.

The condensation reaction can be carried out by simply heating a dry mixture of-the starting materials above about C. or can be carried out equally well in the presence of anhydrous nonreactive hydrocarbon solvents having a refluxing temperature above about 110 C. Lower boiling solvents can also be used by carrying out the reaction under autogenous pressure or under inert gas pressure externally applied. The reaction takes place easily with TiX compounds at temperatures between about and C.

A dry protective atmosphere should be used to secure best yields of the condensation products of the invention.

For various uses of the compounds of the invention, such as for treating substrates to render them waterrepellant, the compounds can be dissolved in organic solvent(s) to secure solutions having any desired product concentration below saturation, preferably to a product concentration of say 245% by weight. For such and other end uses, the compounds can preferably be prepared by carrying out the condensation reaction in the presence of the desired solvent(s). Solution in hydrocarbon solvent(s) additionally serves to protect the product from undue hydrolysis.

The following examples illustrate the principles of the invention and include the best modes presently known to me for practicing the invention in accordance with said principles.

EXAMPLE 1 Dibutylisopropoxystannoxytitanium triisopropoxide i The following starting materials are used:

Dibutyltin oxide g 12.5 (.05 mole) Tetraisopropyl titanate g 14.2 (.05 mole) Toluene ml 300 The materials are charged to a flask, stirred and heated to reflux temperature for 3 hours. Solution takes place. The mass is then allowedto cool. The cool mass is polish filtered by suction to recover a clear filtrate. After stripping solvent from the filtrate, a clear yellowish liquid remains (n E15022). A few drops of the liquid on a watch glass develop a colorless skin or film when exposed to air. On stirring this film to expose fresh surfaces, a white solid forms. The resulting solid turns brown when heated to about 270 C. The brown solid is insoluble in hot toluene.

EXAMPLE 2 Dibutylisopropoxystannoxytitanium trz'isopropoxide The materials used are: Dibutyl-tin oxide g 25.0 (0.1 mole) Tetraisopropyl titanate g 28.4 (0.1 mole) The materials are heated in a flask and liquefaction takes place at 150170 C. in 30 minutes. The liquid is brown. On cooling and standing a clear, beer-colored liquid remains. It contains no solid matter. The refractive index n is 1.4995.

Calculated for C H SnTiO Sn=22.2%; Found: Sn=21.8%; Ti=9.l% (by weight).

EXAMPLE 3 Bis(dibutylisopropoxystannoxy) titanium diisopropoxide The materials used are:

A. Dibutyltin oxide g 37.2 (0.15 mole) B. Tetraisopropyl titanate 1 g 21.3 (0.075 mole) 1 Freshly distilled.

EXAMPLE 4 Dibutylchlorostannoxyrrimethylsilane The starting materials are: n-

A. Dibutyltin oxide g 37.2 (0.15 mole) B. Trimethylchlorosilane g 16.3 (0.15 mole) C. Toluene m1 300 A and C are charged to a 1 liter 3-neck flask equipped with stirrer, thermometer and reflux condenser protected with a dry atmosphere. Then B is added and the mass is heated while being stirred. At 110 a clear solution exists with no indication of distillation of B at its boiling point of 58 C. The flask and contents are allowed to cool. The contents are a clear light yellow solution. On evaporating the toluene first at atmospheric conditions and then under vacuum, a clear light yellow liquid remains; n =1.4994; yield is 92.5%. The liquid does not fume in dry air but appears very sensitive to moisture. As the product contains silicon, tin, and chlorine, the reaction can be formulated as follows:

BllzSDO Me sicl Bu SuOtiMe;

Verification of this reaction is obtained by isolating the known compound (Bu SnCl) O on product hydrolysis.

EXAMPLE 5 Dioctylisop'ropoxysmnnoxytitanium triisopropo'xide Starting materials are:

A. Dioctyltin oxide g 36.1 (0.1 mole) B. Tetraisopropyl tit anate g 38.4 (0.1 mole) C. Toluene ml 500 A and C are charged to a flask equipped with stirrer, thermometer and Dean Stark reffux tube, and A is rendered anhydrous by azeotroping off the water. B is added and the mass is heated, stirred and refluxed for two hours. Reaction takes place, rapidly giving a clear yellow solution. After cooling to room temperature, the solution is polish filtered and 645 ml. toluene is added to the filtrate to bring the product concentration to about 10% by weight.

EXAMPLE 6 DibuzyZ-Z-ethylhexoxystannoxytimnium tri-Z-ethylhexoxide Starting materials are: A

A. Dibutyltin oxide g 24.8 (0.1 mole) B. Tetrakis(2-ethylhexyl)titanate g. 56.5 (0.1 mole) C. Toluene ml 300 1 Freshly distilled.

The materials are worked up in the manner described in Example 5, thereby producing a solution having a product having a product concentration of about 10%.

EXAMPLE 7 Condensation of dibutyltin oxide with tri-isopropyl borate The materials used are:

' Dibutyltin oxide moles 0.1 Tri-isopropylborate do 0.1 Toluene ml 450 The materials are heated together in a flask as previously described until a clear solution is secured. On cooling and standing, 6.9 grams of a white solid separates. The solid has a melting point of 300-3l5 C. The clear filtrate, when applied to filter paper, imparts water-repeliency to the latter. On evaporation of the solvent from the filtrate, a white waxy solid weighing 18.2 grams is secured; it is soluble in petroleum ether and toluene.

EXAMPLE 8 Dibutylisopropoxystannoxyzirconium lriisopropoxide The materials used are:

A. Dibutyltin oxide g 24.8 (0.1 mole) B. Tetr aisopropylzirconate g 32.7 (0.1 mole) C. Toluene ml 500 A and B are combined with dry C, stirred, heated, and refluxed. As refluxing continues a light brown clear solu tion forms and the di-butyltinoxide disappears. The remaining mass is cooled, then diluted with toluene to 575 ml. thereby to prepare a solution having a solids content of 10%.

EXAMPLE 9 Dioctylisopropoxystannoxyaluminum di-isopropoxide The materials used are:

A. Dioctyltin oxide g 36.1 (0.1 mole) B. Aluminum tri-isopropoxide g 20.4 (0.1 mole) C. Toluene ml 500 A, B, and C are charged to 'a flask and heated to reflux with stirring. As the refluxing continues the dioctyltin oxide gradually disappears and a clear light tan solution is formed. When no solid matter remains, some of the toluene is distilled off until the refractive index of the distillate is that of toluene. The remaining mass in the flask is cooled and then diluted to 565 ml. with toluene, thereby to secure a solution having a solids content of 10%. This solution, when applied to paper and dried, imparts water-repellency to the paper.

, EXAMPLE Dioctylbutoxystannoxyvanadium dibutoxyo xide The materials used arei 1 mole) A, 3 (added as 550% solution in Philips Soltrol 1 0 Isoparaflinic hydrocarbon, boiling range 313.5" E. (min.) to 360 F. (max). Flash point 125F.

are charged'to a flask and heated 'to re'flux with stirring under a protective atmosphere. As' refluxing continues, the dioctyltin oxide' gradually disappears and a tann'ishgreen solution appears. 'When all dioctyltin oxide has been consumed, the batch is allowed to cool. Then it is diluted with toluene to 647 ml. to provide asolution having 10% solids.

EXAMPLE 12 The products obtained by reacting dibutyltin oxide with tetraisopropyl titanate by the method of Example 1 using mole ratios of 1:1 to 4:1 are tested for fungicidal activity by the Agar Plate test against five species of fungi.

TABLE I Conn in Zone Inhibition (mm) Example Compound Toluene,

Percent A B i 'C D E 12A." Buz(O;H-1O)SnOTi(OC3H1)'3 10 O 5 2 1 7 1 O 5 '11' Tr 5 V l1 0 0 0 3 12B [B112(C H70)SIlOhTKOCaHTh 7.8 0 3 T1 0 3 V 1 0 2 0 0 3 s 0.1 0 2 0 0 3 12C [Bui(C3H1O)SnOla'IiOCaI-Ir 6L9 2 6 3 1 7 1 '0 5 1 Tr 5 0.1 0. 3 0 0 2 12D [Buz(C3H1O)SnO]iTi 1O 3 6 3 2 6 i 1 0 6 2 1 G 0.1 0 3 0 T1 3 A, Botrytis allis; B,'Penici11ium italieum; C, Aspergillus niger; l), Rhizopus nigrieans; E, Glomerella cingulata. 1

EXAMPLE 11 Dibutylethoxystannoxyvinyldiethoxysilane The materials used are:

Table II'below shows the favorable w ater-repellency attributes of the four above compounds and other compounds of the invention, when measured by recognized water-repellency tests on treated paper. All solutions A. Dibutyltin oxide -g H vinyltriethoxysilan 19.0 (01 mole) contain 2% of the indicated compound in toluene by C. Toluene ml 500 weight.

TABLE II Fotosize 2 Pentration (in seconds) 4 Cobb 3 Example Compound Pickup 1 Test Water .OBN Feathering Gun/M NaOH Ink 5 O. 59 1, 800 0. 64 1, 800 0. 59 1, 800 0. 54 1, 800 0. 46 1, 800 1, 200 129 25. 2 0. 47 1, 800 1, 800 200 22. 8 0. 49 1, 800 1, 800 7 30. O 0. 50 1, 800 1, 800 367 24. O 0. 47 1. 800 1, 800 59 26. 2 10 Oetz(BuO)Sn0VO (OBu 0. 46 1, s00 1, 300 109 27, 0 11 Bug0(%)0)SnOSi(CH= CH2) 0.49 l,800 1,800 6 31. 2

1 Dry weight pickup in pounds per 3000 square feet.

2 Water Fotosize Test:

Special handsheets containing 75% hardwood pulp and softwood pulp are prepared in the Paper Laboratory. A 3%" x 7 sheet of this paper is dipped into the water repellent solution, removed and rolled free of excess solvent with a hard rubber roller on a glass surface. The hundsheets are then air dried and conditioued at 73 F. and relative humidity for one day.

The treated paper is placed under the surface of a reservoir of water in the Trying-Albert Fotosize Penetration Tester and the number of seconds required to efiect wetting or penetration is recorded. This time is automatically recorded by a timer shut-elf actuated by minimum light transmittance through the paper.

Feathering ink, aqueous base, or aqueous acid can be substituted for the plain water.

TAPPI Standards and Suggested Methods; T-441 M450; (Technical Association of the Pulp and Paper Industry). A five minute exposure test is used, and the weight of water absorbed per square meter 01' paper is reported. Paper can be 0.0004 mil and over in thickness.

4 OEH and EHO represent Q-ethylhexoxide.

5 Feathering ink is prepared by combining: 6 grams blue dye (National 2 REX); 250 ml. water at 120 F.; 6 ml. hydrochloric acid. Cool to F. and dilute to a total volume of 950 ml.

7 EXAMPLE 13 This example illustrates the use of various dibutylstannoxy condensates as urethane foam cataylsts.

To prepare the foams 200 grams of polyethefi is weighed into a paper drinking cup. Silicone oil (dimethyl polysiloxane) in the amount of 3.0 grams, and 0.6-1.0 gram of catalysts are added and mixed with the resin for two minutes with a high speed 3-blade propeller mixer.

Diethylene triamine (0.2 g.) and N-ethylmorpholine (0.30 g.) are dissolved in 7.4 g. water in a small beaker. This solution is added to the above mixture and stirred into it by mixing for one minute.

Toluene diisocyanate (96.4 g.) is rapidly combined with the above mixture and poured into a suitable container.

The stopwatch is started at the time of pouring, and the elapsed time (in seconds) required for the foam to attain maximum height is recorded as rise time. A control catalyst, e.g. stannous octoate, gives a rise time of 50-90 seconds.

The following table summarizes the results of various tests carried out in the foregoing manner with the indicated compounds as catalysts:

wherein R is an alkyl group of 1-8 carbons;

wherein E is a radical selected from the group consistwherein X of the above radicals is a monovalent radical selected from the group consisting of -OR radicals and halogen;

wherein R is a monovalent radical selected from the group consisting of hydrocarbyl radicals and fluohydrocarbyl radicals of 1-18 carbon atoms;

wherein R is a monovalent hydrocarbyl radical of 1-12 carbon atoms; wherein M is selected from the group consisting of Al, Si, B, Ti, Zr and the trivalent vanadyl radical=VO;

wherein v is the valency of M(i.e. 3 or 4);

wherein m is an integer between 1 and v1 inclusive;

wherein n is an integer between 1 and v inclusive;

and wherein m+n is not greater than v.

4. The method of rendering cellulosic webs water-repellent comprising contacting said cellulosic web with a solution of an organometallic compound according to the formula wherein R is an alkyl group of 1-8 carbons;

Amount Rise Catalyst Example Compound Elsi? Time Color of foam Rating Buz(OBu)SnOTi(0Bu)a 08 Good. 11 Buz(EtO)Sn0Si(CH=CHz)(OEt)Q.-.. 0.8 Very good. 11.... Buz(El7O)SnOSi(CI-I=CH2)(OEE)2. 0.5 Do. 6 Bu (EHO)SnOTi(OEH)3 0.8 Dov Having described my invention, what I claim is: 1. An or anometallic compound according to the formula [R SnO] E wherein R is an alkyl group of 1-8 carbons;

wherein E is a radical selected from the group consistwherein X of the above radicals is a halogen;

wherein R is a monovalent hydrocarbyl radical of l-12 carbon atoms;

wherein M is selected from the group consisting of Al,

Si, B, Ti, Zr and the trivalent vanadyl radical=VO;

wherein v is a valency of M(i.e. 3 or 4);

wherein m is an integer between 1 and v-l inclusive;

wherein n is an integer between 1 and v inclusive; and

wherein m+n is not greater than v.

2. An organometallic compound according to claim 1 wherein X is chlorine.

3. The process for making polyurethane foam comprising contacting polyether, toluene diisocyanate and water as a foaming agent in the presence of a catalytic amount of an organometallic compound accordingto the formula molecular weight of about 3,000, an average hydroxyl nurnber (mg. KOH/gram) of 56.

wherein E is a radical selected from the group consisting of MX and M(R' )X wherein X of the above radicals is a monovalent radical selected from the group consisting of -OR radicals and halogens;

wherein R is a monovalent radical selected from the group consisting of hydrocarbyl radicals and fluohydrocarbyl radicals of l-8 carbon atoms;

wherein R is a monovalent hydrocarbyl radical of l-l2 carbon atoms;

wherein M is selected from the group consisting of Al,

' Si,-B, Ti, Zr and the trivalent vanadyl radical=VO;

wherein v is the valency of M(i.e. 3 or'4);

wherein m is an integer between 1 and v-l inclusive;

wherein n is an integer between 1 and v inclusive;

and wherein m-l-n is not greater than v.

5. The method according to claim 4 wherein said cellulosic web is paper.

References Cited by the Examiner UNITED STATES PATENTS 5/1952 Carroll 260-429.5 X 1/1959 Ramsden 260-429.7 

4. THE METHOD OF RENDERING CELLULOSIC WEBS WATER-REPELLENT COMPRISING CONTACTING SAID CELLULOSIC WEB WITH A SOLUTION OF AN ORGANOMETALLIC COMPOUND TO THE FORMULA 